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adjective certain pronunciation in British English /ˈsɜː(r)t(ə)n/
  1. 1
    [never before noun] having no doubts that something is true
    I’m not absolutely certain, but I think I’m right.
    certain (that): You can be pretty certain she’s not going to like it.
    certain who: We still can’t be certain who is going to win.
    certain of/about: I’ve never been more certain of anything in my entire life.
    You don’t seem too certain about it.
    know/say for certain: I think I met her in 1985, but I can’t say for certain.
    Synonyms and related words
  2. 2
    definitely going to happen
    They face certain death if they are sent back to their home country.
    Success is by no means certain.
    be certain to do something: Interest rates seem certain to rise next month.
    it is certain (that): It’s not certain that this method would have worked.
    certain of: Mexico is now certain of a place in the finals.
    1. a.
      definitely true
      One thing was certain: someone had been in his room.
    2. b.
      definitely known
      it is certain who: It’s not yet certain who the driver of the car was.
      Synonyms and related words

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